Well, then a printing scale of about 1:12 for letter paper size would be appropriate, if you want to to show several views of the box on one sheet, or 1:6 or similar whatever is standard in imperials, for one view per sheet.
Even if you don't intend to print it is advisable to consider a scale in order to get reasonable text and arrow sizes in the dimensions.
box_inch_1_12_letter.dxf